Firefighters are still searching for the source of smoke.
There has been no fire identified in the building at this stage.
About 1800 people remain evacuated from the building while fire crews conduct a floor-by-floor inspection.
Firefighters are still searching for the source of smoke.
There has been no fire identified in the building at this stage.
About 1800 people remain evacuated from the building while fire crews conduct a floor-by-floor inspection.